JP2015203099A - Adhesive composition for double-sided tape for bonding concrete or mortar, double-sided tape for bonding concrete or mortar, and method for producing double-sided tape for bonding concrete or mortar - Google Patents
Adhesive composition for double-sided tape for bonding concrete or mortar, double-sided tape for bonding concrete or mortar, and method for producing double-sided tape for bonding concrete or mortar Download PDFInfo
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本発明は、コンクリート又はモルタル接着用両面テープ、その製法、及びその原料となる粘着剤組成物に関する。 The present invention relates to a double-sided tape for bonding concrete or mortar, a method for producing the same, and a pressure-sensitive adhesive composition as a raw material thereof.
コンクリート又はモルタルは、建物の壁面、床面、柱等に広く使用されており、屋外、屋内を問わず設置がされている。かかるコンクリート又はモルタルは多孔質であり、炭酸カルシウムを含んでいるため、水に浸漬すると、いわゆるアウトガスが発生する。従って、コンクリート又はモルタルに粘着テープを貼り付けると、このアウトガスが粘着剤とコンクリートの界面に滞留し、テープとコンクリートの接触面積が小さくなり、粘着力が低下してしまう。 Concrete or mortar is widely used for building walls, floors, pillars, etc., and is installed regardless of whether it is outdoors or indoors. Since such concrete or mortar is porous and contains calcium carbonate, so-called outgas is generated when immersed in water. Therefore, when an adhesive tape is affixed to concrete or mortar, this outgas stays at the interface between the adhesive and the concrete, the contact area between the tape and concrete is reduced, and the adhesive force is reduced.
これに対し、従来、粘着層表面に凹凸を形成させた接着シートが知られている（特許文献１））には、粘着層表面に凹凸があり、アウトガスの逃げ道となっている粘着シートが開示されている。しかしながら、このような凹凸のある粘着層を有する接着シートをコンクリート又はモルタルに所定の物体を固定する固定用途に用いると、接触面積が小さいことが災いし、十分な保持性が発揮できなかった。 On the other hand, conventionally, an adhesive sheet having irregularities formed on the surface of the pressure-sensitive adhesive layer is known (Patent Document 1), and a pressure-sensitive adhesive sheet having irregularities on the surface of the pressure-sensitive adhesive layer and serving as an outgas escape path is disclosed Has been. However, when the adhesive sheet having such an uneven pressure-sensitive adhesive layer is used for fixing a predetermined object to concrete or mortar, the contact area is small, and sufficient retainability cannot be exhibited.
本発明が解決しようとする課題は、コンクリート又はモルタルから発生するアウトガスを粘着剤とコンクリート又はモルタルとの界面から逃がすような構造を有しつつ、十分な保持性をもたらす両面テープを提供することである。 The problem to be solved by the present invention is to provide a double-sided tape that provides sufficient retention while having a structure that allows outgas generated from concrete or mortar to escape from the interface between the adhesive and concrete or mortar. is there.
かかる状況の下、本発明者らは鋭意研究した結果、アクリル系粘着剤を含む粘着剤組成物に多孔質粒子を特定の量配合し、かつ特定の厚みの粘着剤層を形成させることで上記課題を解決できることを見出した。本発明はかかる新規の知見に基くものである。 Under such circumstances, as a result of intensive studies, the present inventors have blended a specific amount of porous particles in a pressure-sensitive adhesive composition containing an acrylic pressure-sensitive adhesive, and form a pressure-sensitive adhesive layer having a specific thickness. I found that the problem could be solved. The present invention is based on such new knowledge.
従って、本発明は以下の項を提供する：
項１．アクリル系粘着剤及び多孔質粒子を含むコンクリート又はモルタル接着用両面テープ用粘着剤組成物であって、該多孔質粒子の配合割合が該粘着剤組成物の体積百分率１００％に対し１０〜３０％であり、かつ両面テープの製造において該コンクリート又はモルタル接着用両面テープ用粘着剤組成物からなる粘着剤層の厚みに対して該多孔質粒子の平均粒径が３０〜６０％となるように両面テープの基材に塗布されるコンクリート又はモルタル接着用両面テープ用粘着剤組成物。
Accordingly, the present invention provides the following sections:
Item 1. A pressure-sensitive adhesive composition for a concrete or mortar adhesive double-sided tape comprising an acrylic pressure-sensitive adhesive and porous particles, wherein the mixing ratio of the porous particles is 10 to 30% with respect to 100% by volume of the pressure-sensitive adhesive composition. And in the production of the double-sided tape, the double-sided tape has an average particle diameter of 30 to 60% with respect to the thickness of the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition for the double-sided adhesive for concrete or mortar. A pressure-sensitive adhesive composition for a double-sided tape for bonding concrete or mortar applied to a tape substrate.
項２．前記多孔質粒子が該多孔質粒子の内部を貫通するような空洞部を有する、項１に記載のコンクリート又はモルタル接着用両面テープ用粘着剤組成物。 Item 2. Item 2. The pressure-sensitive adhesive composition for double-sided tape for concrete or mortar bonding according to Item 1, wherein the porous particle has a cavity that penetrates the inside of the porous particle.
項３．アクリル系粘着剤及び多孔質粒子を含む粘着剤組成物を基材に塗布する工程を含む、コンクリート又はモルタル接着用両面テープの製造方法であって、該多孔質粒子の配合割合が該粘着剤組成物の体積１００％に対し１０〜３０％であり、かつ該粘着剤組成物からなる粘着剤層の厚みに対して該多孔質粒子の平均粒径が３０〜６０％である、方法。 Item 3. A method for producing a double-sided adhesive tape for adhering concrete or mortar, comprising a step of applying a pressure-sensitive adhesive composition comprising an acrylic pressure-sensitive adhesive and porous particles to a substrate, wherein the mixing ratio of the porous particles is the pressure-sensitive adhesive composition. The method in which the average particle diameter of the porous particles is 30 to 60% with respect to the thickness of the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition with respect to 100% of the volume of the product.
項４．前記多孔質粒子が該多孔質粒子の内部を貫通するような空洞部を有する、項３に記載の方法。 Item 4. Item 4. The method according to Item 3, wherein the porous particle has a cavity that penetrates the inside of the porous particle.
項５．アクリル系粘着剤及び多孔質粒子を含む粘着剤組成物からなる粘着剤層を備えるコンクリート又はモルタル接着用両面テープであって、該多孔質粒子の配合割合が該粘着剤組成物の体積１００％に対し１０〜３０％であり、かつ該粘着剤層の厚みに対して該多孔質粒子の平均粒径が３０〜６０％である、コンクリート又はモルタル接着用両面テープ。 Item 5. A double-sided adhesive tape for adhering concrete or mortar comprising a pressure-sensitive adhesive layer comprising a pressure-sensitive adhesive composition containing an acrylic pressure-sensitive adhesive and porous particles, wherein the mixing ratio of the porous particles is 100% of the volume of the pressure-sensitive adhesive composition. A double-sided adhesive tape for adhering concrete or mortar, wherein the average particle diameter of the porous particles is 30 to 60% with respect to the thickness of the pressure-sensitive adhesive layer.
項６．前記多孔質粒子が該多孔質粒子の内部を貫通するような空洞部を有する、項５に記載のコンクリート又はモルタル接着用両面テープ。 Item 6. Item 6. The double-sided adhesive tape for adhering concrete or mortar according to Item 5, wherein the porous particle has a cavity that penetrates the inside of the porous particle.
本発明によれば、コンクリート又はモルタルから発生するアウトガスを粘着剤とコンクリート又はモルタルとの界面から逃がすような構造を有しつつ、十分な保持性をもたらす両面テープを提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the double-sided tape which provides sufficient holding property can be provided, having the structure which escapes the outgas generated from concrete or mortar from the interface of an adhesive and concrete or mortar.
コンクリート又はモルタル接着用両面テープ用粘着剤組成物
本発明は、アクリル系粘着剤及び多孔質粒子を含むコンクリート又はモルタル接着用両面テープ用粘着剤組成物であって、該多孔質粒子の配合割合が該粘着剤組成物の体積百分率１００％に対し１０〜３０％であり、かつ両面テープの製造において該コンクリート又はモルタル接着用両面テープ用粘着剤組成物からなる粘着剤層の厚みに対して該多孔質粒子の平均粒径が３０〜６０％となるように両面テープの基材に塗布されるコンクリート又はモルタル接着用両面テープ用粘着剤組成物を提供する。
The present invention relates to a pressure-sensitive adhesive composition for a double-sided tape for concrete or mortar adhesion, which comprises an acrylic pressure-sensitive adhesive and porous particles, and the mixing ratio of the porous particles is 10-30% of the volume percentage of the pressure-sensitive adhesive composition is 100%, and in the production of the double-sided tape, the porosity relative to the thickness of the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition for concrete or mortar adhesive Provided is a pressure-sensitive adhesive composition for double-sided tape for bonding concrete or mortar that is applied to a base material of a double-sided tape such that the average particle size of the fine particles is 30 to 60%.
本発明において、アクリル系粘着剤としては、両面テープに用いられるものを広く採用することができ、例えば、各種の（メタ）アクリル酸エステルに酢酸ビニル、アクリロニトリル等のモノマー、（メタ）アクリル酸、ヒドロキシアクリレート、アミノエチル(メタ)クリレート等の官能基含有モノマーを共重合してなるアクリル系共重合体等を用いることができる。 In the present invention, as the acrylic pressure-sensitive adhesive, those used for double-sided tapes can be widely used. For example, various (meth) acrylic acid esters, monomers such as vinyl acetate and acrylonitrile, (meth) acrylic acid, An acrylic copolymer obtained by copolymerizing a functional group-containing monomer such as hydroxy acrylate or aminoethyl (meth) acrylate can be used.
本発明において、多孔質粒子としては、アルミナ、シリカ、アパタイト、チタニア等を素材とする粒子が挙げられる。これらの粒子は１種単独で、又は２種類以上を混合して使用することができる。また、本発明において、前記多孔質粒子が該多孔質粒子の内部を貫通するような空洞部を有するようなものが好ましい。本発明において、多孔質粒子の配合割合は、前記コンクリート又はモルタル接着用両面テープ用粘着剤組成物の体積百分率１００％に対し１０〜３０％であり、15〜25％であることが好ましく、18〜22％であることがより好ましい。多孔質粒子の平均粒径は、粘着剤層との関係が後述の範囲となる限りにおいて限定されないが、例えば、90〜1800μｍ、より好ましくは200〜900μｍの範囲で適宜設定できる。ここで、多孔質粒子の平均粒径は、(レーザー回折/散乱式)粒度測定装置により測定することができる。 In the present invention, examples of the porous particles include particles made of alumina, silica, apatite, titania and the like. These particles can be used alone or in combination of two or more. In the present invention, it is preferable that the porous particles have a cavity that penetrates the inside of the porous particles. In the present invention, the mixing ratio of the porous particles is 10 to 30%, preferably 15 to 25%, with respect to 100% by volume of the pressure-sensitive adhesive composition for double-sided tape for concrete or mortar adhesion, More preferably, it is ˜22%. The average particle diameter of the porous particles is not limited as long as the relationship with the pressure-sensitive adhesive layer is in the range described below, but can be appropriately set in the range of, for example, 90 to 1800 μm, more preferably 200 to 900 μm. Here, the average particle size of the porous particles can be measured by a (laser diffraction / scattering type) particle size measuring device.
また、本発明のコンクリート又はモルタル接着用両面テープ用粘着剤組成物は、両面テープ用基材に塗布されることにより使用される。その際、コンクリート又はモルタル接着用両面テープ用粘着剤組成物からなる粘着剤層の厚みに対して該多孔質粒子の平均粒径が３０〜６０％、好ましくは40〜50％、より好ましくは42〜48％となるように両面テープの基材に塗布されることを特徴とする。両面テープの製造において採用される、本発明のコンクリート又はモルタル接着用両面テープ用粘着剤組成物からなる粘着剤層の厚みは、多孔質粒子の平均粒径との関係が上記数値範囲となる限りにおいて限定されないが、例えば、300〜3000μｍ、より好ましくは500〜1500μｍの範囲で適宜設定できるが、それ以上でも問題ない。 Moreover, the adhesive composition for double-sided tapes for concrete or mortar adhesion of this invention is used by apply | coating to the base material for double-sided tapes. At that time, the average particle size of the porous particles is 30 to 60%, preferably 40 to 50%, more preferably 42 with respect to the thickness of the pressure-sensitive adhesive layer comprising the pressure-sensitive adhesive composition for double-sided tape for bonding concrete or mortar. It is characterized by being applied to a base material of a double-sided tape so as to be ˜48%. As long as the thickness of the pressure-sensitive adhesive layer composed of the pressure-sensitive adhesive composition for double-sided tape for concrete or mortar adhesion of the present invention employed in the production of double-sided tape is as long as the relationship with the average particle diameter of the porous particles is within the above numerical range. Although not limited, for example, it can be appropriately set in the range of 300 to 3000 μm, more preferably 500 to 1500 μm.
コンクリート又はモルタル接着用両面テープ
本発明は、アクリル系粘着剤及び多孔質粒子を含む粘着剤組成物からなる粘着剤層を備えるコンクリート又はモルタル接着用両面テープであって、該多孔質粒子の配合割合が該粘着剤組成物の体積１００％に対し１０〜３０％であり、かつ該粘着剤層の厚みに対して該多孔質粒子の平均粒径が３０〜６０％である、コンクリート又はモルタル接着用両面テープを提供する。
The present invention is a double-sided tape for bonding concrete or mortar comprising a pressure-sensitive adhesive layer comprising a pressure-sensitive adhesive composition containing an acrylic pressure-sensitive adhesive and porous particles, and the mixing ratio of the porous particles For adhering concrete or mortar, wherein the volume of the pressure-sensitive adhesive composition is 10 to 30% with respect to 100% of the volume of the pressure-sensitive adhesive composition, and the average particle diameter of the porous particles is 30 to 60% with respect to the thickness of the pressure-sensitive adhesive layer Provide double-sided tape.
上記粘着剤層に含まれる多孔質粒子、その含有量、平均粒径、粘着剤層の厚み、多孔質粒子と粘着剤層の厚みとの関係等は前記のとおりである。 The porous particles contained in the pressure-sensitive adhesive layer, the content thereof, the average particle diameter, the thickness of the pressure-sensitive adhesive layer, the relationship between the porous particles and the thickness of the pressure-sensitive adhesive layer, and the like are as described above.
本発明において、粘着テープは上記粘着剤層からなるものであってもよい。当該実施形態において、任意選択で、粘着剤層の片面又は両面に離型層を積層していてもよい。本発明において用いられる離型層の素材としては、両面テープの基材として使用されるものを広く採用できるが、例えば、シリコンコート離型紙、シリコンコート離型PETフィルム、シリコンコート離型ポリエチレンフィルム等を挙げることができる。離型層の厚みは特に限定されないが、例えば、40〜300μｍ、より好ましくは100〜150μｍの範囲で適宜設定できる。 In this invention, an adhesive tape may consist of the said adhesive layer. In the embodiment, a release layer may be optionally laminated on one side or both sides of the pressure-sensitive adhesive layer. As a material for the release layer used in the present invention, those used as a base material for double-sided tape can be widely adopted. For example, silicon-coated release paper, silicon-coated release PET film, silicon-coated release polyethylene film, etc. Can be mentioned. Although the thickness of a mold release layer is not specifically limited, For example, it can set suitably in 40-300 micrometers, More preferably, it is the range of 100-150 micrometers.
また、別の実施形態において、本発明の両面テープは、基材を備えていてもよい。より具体的には、当該実施形態において、本発明は、第１粘着剤層、基材層及び第２粘着剤層を有するコンクリート又はモルタル接着用両面テープであって、該第１粘着剤層がアクリル系粘着剤及び多孔質粒子を含む粘着剤組成物からなり、該多孔質粒子の配合割合が該粘着剤組成物の体積１００％に対し１０〜３０％であり、かつ該第１粘着剤層の厚みに対して該多孔質粒子の平均粒径が３０〜６０％である、コンクリート又はモルタル接着用両面テープを提供する。 Moreover, in another embodiment, the double-sided tape of this invention may be equipped with the base material. More specifically, in this embodiment, the present invention is a double-sided adhesive tape for bonding concrete or mortar having a first pressure-sensitive adhesive layer, a base material layer, and a second pressure-sensitive adhesive layer, wherein the first pressure-sensitive adhesive layer is The pressure-sensitive adhesive composition comprises an acrylic pressure-sensitive adhesive and porous particles, the blending ratio of the porous particles is 10 to 30% with respect to 100% of the volume of the pressure-sensitive adhesive composition, and the first pressure-sensitive adhesive layer A double-sided adhesive tape for bonding concrete or mortar, in which the average particle diameter of the porous particles is 30 to 60% with respect to the thickness of the adhesive.
当該両面テープの概要を図１に示す。尚、図１は本発明の１実施形態を例示するものであり、本願発明は当該図に記載されているものに限定されない。 An outline of the double-sided tape is shown in FIG. FIG. 1 illustrates one embodiment of the present invention, and the present invention is not limited to that described in the figure.
本発明において、基材層１に対し、第１粘着剤層２及び第２粘着剤層２’が積層される。本発明において、第１粘着剤層とは、コンクリート又はモルタルに貼り付られる面を示す。ここで、第１粘着剤層２は、前述したコンクリート又はモルタル接着用両面テープ用粘着剤組成物からなる。第１粘着剤層２に含まれる多孔質粒子、その含有量、平均粒径、第１粘着剤層２の厚み、多孔質粒子と第１粘着剤層２の厚みとの関係等は前記のとおりである。 In the present invention, the first pressure-sensitive adhesive layer 2 and the second pressure-sensitive adhesive layer 2 ′ are laminated on the base material layer 1. In this invention, a 1st adhesive layer shows the surface affixed on concrete or mortar. Here, the 1st adhesive layer 2 consists of an adhesive composition for double-sided tapes for concrete or mortar adhesion mentioned above. The porous particles contained in the first pressure-sensitive adhesive layer 2, the content thereof, the average particle diameter, the thickness of the first pressure-sensitive adhesive layer 2, the relationship between the porous particles and the thickness of the first pressure-sensitive adhesive layer 2, and the like are as described above. It is.
また、本発明において、第２粘着剤層２’は、前述したコンクリート又はモルタル接着用両面テープ用粘着剤組成物から構成されてもよく、また当該粘着剤組成物以外の、両面テープに通常使用される粘着剤層を用いてもよい。第２粘着剤層２’の厚みは特に限定されないが、例えば、20〜3000μｍ、より好ましくは500〜1500μｍの範囲で適宜設定できる。 Moreover, in this invention, 2nd adhesive layer 2 'may be comprised from the adhesive composition for double-sided tapes for concrete or mortar adhesion mentioned above, and is normally used for double-sided tapes other than the said adhesive composition A pressure-sensitive adhesive layer may be used. Although the thickness of 2nd adhesive layer 2 'is not specifically limited, For example, it can set suitably in 20-3000 micrometers, More preferably, it is the range of 500-1500 micrometers.
本発明において用いられる基材１の素材としては、両面テープの基材として使用されるものを広く採用できるが、例えば、不織布、アクリルフォーム、PETクロス等を挙げることができる。基材１の厚みは特に限定されないが、例えば、100〜2000μｍ、より好ましくは500〜1000μｍの範囲で適宜設定できる。 As the material of the base material 1 used in the present invention, those used as the base material of the double-sided tape can be widely adopted, and examples thereof include non-woven fabric, acrylic foam, PET cloth and the like. Although the thickness of the base material 1 is not specifically limited, For example, it can set suitably in the range of 100-2000 micrometers, More preferably, 500-1000 micrometers.
また、本発明においては、任意選択で、粘着剤層のさらに外側に、離型層３、３’を積層させてもよい。本発明において用いられる離型層３、３’の素材及び厚みは特に限定されず、例えば、前述の実施形態において例示した素材及び厚みを採用することができる。 In the present invention, the release layers 3 and 3 ′ may optionally be laminated on the further outer side of the pressure-sensitive adhesive layer. The material and thickness of the release layers 3 and 3 ′ used in the present invention are not particularly limited, and for example, the material and thickness exemplified in the above embodiment can be adopted.
本発明のコンクリート又はモルタル接着用両面テープは、上記基材の両面に上記粘着剤組成物を塗工して粘着剤層を形成することにより製造することができる。上記塗工の方法は特に限定されず、例えば、ドクターナイフやスピンコーター等を用いた従来公知の塗工方法を用いることができる。 The double-sided tape for adhering concrete or mortar of the present invention can be produced by applying the pressure-sensitive adhesive composition on both sides of the base material to form a pressure-sensitive adhesive layer. The coating method is not particularly limited, and for example, a conventionally known coating method using a doctor knife, a spin coater, or the like can be used.
以下に、実施例・比較例に記載の具体的な実施形態を用いて本発明について説明するが、本発明はこれらの特定の実施形態に限定されない。
以下に、実施例・比較例に記載の具体的な実施形態を用いて本発明について説明するが、本発明はこれらの特定の実施形態に限定されない。
Hereinafter, the present invention will be described using specific embodiments described in Examples and Comparative Examples, but the present invention is not limited to these specific embodiments.
Hereinafter, the present invention will be described using specific embodiments described in Examples and Comparative Examples, but the present invention is not limited to these specific embodiments.
実施例１
（１）アクリル系粘着剤の調製
2-エチルヘキシル 100質量部、アクリル酸 7質量部、及び重合開始剤として
ベンジルジメチルケタール 0.4質量部、さらに増粘剤としてアエロジル200(日本アエロジル株式会社製)を3質量部、水1重量部を添加し、粘着剤の調整とする。
Example 1
(1) Preparation of acrylic adhesive
100 parts by weight of 2-ethylhexyl, 7 parts by weight of acrylic acid, 0.4 parts by weight of benzyldimethyl ketal as a polymerization initiator, 3 parts by weight of Aerosil 200 (manufactured by Nippon Aerosil Co., Ltd.) as a thickener, and 1 part by weight of water are added And adjusting the pressure-sensitive adhesive.
（２）両面テープの製造
前記（１）で得られたアクリル系粘着剤 ４０質量部、多孔質無機粒子として、多孔質シリカ粒子 （平均粒径90μｍ、当該多孔質粒子の内部を貫通するような空洞部を有する）を粘着剤組成物に対する体積百分率で１０％混合して粘着剤層組成物を得た。シリコン離型PETフィルム（長さ210ｃｍ×幅297ｃｍ×厚み0.03ｃｍ、素材：PETフィルム）に、３００μｍの厚みとなるよう上記粘着剤層組成物を塗布し、上から同じシリコン離型PETフィルムで覆い、UVランプを照射し、両面テープを製造した。
(2) Manufacture of double-sided tape 40 parts by mass of the acrylic pressure-sensitive adhesive obtained in the above (1), porous inorganic particles as porous inorganic particles (average particle size of 90 μm, such as penetrating the inside of the porous particles) (With a cavity) was mixed at a volume percentage of 10% with respect to the pressure-sensitive adhesive composition to obtain a pressure-sensitive adhesive layer composition. Apply the above adhesive layer composition to a silicon release PET film (length 210cm x width 297cm x thickness 0.03cm, material: PET film) to a thickness of 300μm, and cover with the same silicon release PET film from above A double-sided tape was manufactured by irradiating a UV lamp.
実施例２〜４及び比較例１〜４
粘着剤層組成物の組成を下記表１に示すようにする以外は、上記実施例１と同様にして実施例２〜４及び比較例１〜４の両面テープを製造した。尚、表１中、実施例１〜4、比較例1〜4では、多孔質粒子として、該多孔質粒子の内部を貫通するような空洞部を有するものを使用した。
Examples 2 to 4 and Comparative Examples 1 to 4
Except making the composition of the pressure-sensitive adhesive layer composition as shown in Table 1 below, double-sided tapes of Examples 2 to 4 and Comparative Examples 1 to 4 were produced in the same manner as in Example 1 above. In Table 1, in Examples 1 to 4 and Comparative Examples 1 to 4, those having a hollow portion penetrating the inside of the porous particles were used as the porous particles.
評価試験
実施例１〜４及び比較例１〜４の両面テープについて下記の方法により評価した。
Evaluation Tests The double-sided tapes of Examples 1 to 4 and Comparative Examples 1 to 4 were evaluated by the following methods.
対コンクリート粘着力
＃１５０研磨コンクリート板に両面テープを貼り付けた後、23℃にて1日間養生し、300mm/minの速度で180°剥離粘着力を測定した。
Adhesive force against concrete # 150 Double-sided tape was applied to a polished concrete plate, and then cured at 23 ° C. for 1 day, and 180 ° peel adhesive strength was measured at a speed of 300 mm / min.
水浸漬後 対コンクリート粘着力
＃１５０研磨コンクリート板に両面テープを貼り付けた後、23℃にて1日間養生し、さらに23℃の水に1日間浸漬後に300mm/minの速度で180°剥離粘着力を測定した。
After water immersion Adhesive strength against concrete # 150 Affixed double-sided tape to polished concrete plate, then cured at 23 ° C for 1 day, and further immersed in water at 23 ° C for 1 day, then 180 ° peel adhesion at a rate of 300mm / min The force was measured.
低下率
前記方法で測定した対コンクリート粘着力及び水浸漬後 対コンクリート粘着力から下記の式にて算出した：
低下率＝「水浸漬後 対コンクリート粘着力」÷「対コンクリート粘着力」×１００。
低下率の数値が大きいほど、浸水による粘着力の低下が抑えられていることを意味する。
Decrease rate Calculated from the following formula from the adhesive strength against concrete measured by the above method and the adhesive strength after immersion in water:
Decrease rate = “after water immersion to concrete adhesive strength” ÷ “to concrete adhesive strength” × 100.
It means that the fall of the adhesive force by water immersion is suppressed, so that the numerical value of a reduction rate is large.
結果を下記表１に示す： The results are shown in Table 1 below:
１：基材
２：第１粘着剤層
２’：第２粘着剤層
３、３’：離型層
1: Substrate 2: First adhesive layer 2 ′: Second adhesive layer 3, 3 ′: Release layer
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| JPS63291968A (en) * | 1987-05-25 | 1988-11-29 | Semedain Kk | Moisture-permeable aqueous adhesive composition |
| JPH0782044A (en) * | 1993-09-14 | 1995-03-28 | Nippon Steel Corp | Monolithic refractory |
| JPH09137137A (en) * | 1995-11-17 | 1997-05-27 | Sekisui Chem Co Ltd | Acrylic tacky adhesive tape |
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